https://sourceware.org/bugzilla/show_bug.cgi?id=20319
Bug ID: 20319
Summary: as and objdump allow "fmov sn, xm"
Product: binutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: cov at codeaurora dot org
Target Milestone: ---
The assembler as assembles invalid fmov mnemonics and the disassembler objdump
disassembles invalid fmov-like opcodes as if they were valid/defined. The
situation arises if the destination register is 32 bits (for example s9) and
the source register is 64 bits (for example x0).
Steps to Reproduce as Issue:
echo fmov s9, x0 > astest.s
aarch64-linux-gnu-as astest.s -o astest
Actual Results: aarch64-linux-gnu-as completes successfully
Expected Results: aarch64-linux-gnu-as fails with informative message that only
32-bit source operands are permitted for fmov when a 32-bit destination operand
is used
Steps to Reproduce objdump Issue:
echo 0900279e | xxd -r -p > objtest
aarch64-linux-gnu-objdump -D -b binary -maarch64 objtest
Actual results: opcode disassembled as fmov s9, x0
Expected Results: opcode disassembled as .inst 0x0900279e ; undefined
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